I am gardening for the first time, and so far so good! We have planted a few spinach plants, and have harvest three times from them in the last month. How long will the spinach continue to grow and ...

So, again being a newb as I am...
I planted some spinach seeds in these black plastic pots that I transplanted other plants from. There is a good 3 inches of height in the planter with no soil. It's ...